diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..25b0ac9
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,20 @@
+name: Create release PR or publish GitHub release and Rust crate
+
+permissions:
+  pull-requests: write
+  contents: write
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dtolnay/rust-toolchain@stable
+    - uses: MarcoIeni/release-plz-action@v0.5
+      env:
+        GITHUB_TOKEN: ${{ secrets.PAT_GITHUB }}
+        CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
new file mode 100644
index 0000000..eccef38
--- /dev/null
+++ b/.github/workflows/rust.yml
@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build_and_test:
+    name: Build, check, and test
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dtolnay/rust-toolchain@stable
+      with:
+        components: clippy
+    - uses: taiki-e/install-action@v2
+      with:
+        tool: cargo-hack,just
+    - uses: Swatinem/rust-cache@v2
+    - run: just build
+    - run: just check
+    #- run: just fmt --check
+    - run: just test
+  doc:
+    name: Build and publish docs
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/configure-pages@v3
+    - uses: dtolnay/rust-toolchain@nightly
+    - uses: taiki-e/install-action@v2
+      with:
+        tool: just
+    - uses: Swatinem/rust-cache@v2
+    - run: just doc
+    - uses: actions/upload-pages-artifact@v3
+      with:
+        path: target/doc
+    - uses: actions/deploy-pages@v4
+      if: github.ref_name == 'main'
+      id: deployment
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..f32687a
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,10 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+      - id: detect-private-key
+      - id: check-merge-conflict
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0f8af64..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-dist: bionic
-language: rust
-cache: cargo
-rust:
-  - stable
-env:
-  - RUST_BACKTRACE=short
diff --git a/.vscode/launch.json b/.vscode/launch.json
index acc54de..3629e14 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -38,4 +38,4 @@
             "cwd": "${workspaceFolder}"
         }
     ]
-}
\ No newline at end of file
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 7a5dde2..4538515 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,6 @@
 {
     "explorer.sortOrder": "mixed",
-    "restructuredtext.confPath": ""
-}
\ No newline at end of file
+    "restructuredtext.confPath": "",
+    "rust-analyzer.check.features": "all",
+    "rust-analyzer.check.command": "clippy",
+}
diff --git a/document_tree/src/attribute_types.rs b/document_tree/src/attribute_types.rs
index 411b24d..ef00544 100644
--- a/document_tree/src/attribute_types.rs
+++ b/document_tree/src/attribute_types.rs
@@ -15,9 +15,13 @@ pub enum EnumeratedListType {
 	UpperRoman,
 }
 
-#[derive(Debug,PartialEq,Eq,Hash,Serialize,Clone)]
-pub enum FixedSpace { Default, Preserve }  // yes, default really is not “Default”
-impl Default for FixedSpace { fn default() -> FixedSpace { FixedSpace::Preserve } }
+#[derive(Default,Debug,PartialEq,Eq,Hash,Serialize,Clone)]
+pub enum FixedSpace {
+	Default,
+	// yes, default really is not “Default”
+	#[default]
+	Preserve,
+}
 
 #[derive(Debug,PartialEq,Eq,Hash,Serialize,Clone)] pub enum AlignH { Left, Center, Right}
 #[derive(Debug,PartialEq,Eq,Hash,Serialize,Clone)] pub enum AlignHV { Top, Middle, Bottom, Left, Center, Right }
@@ -32,12 +36,7 @@ impl Default for FixedSpace { fn default() -> FixedSpace { FixedSpace::Preserve
 // The table DTD has the cols attribute of tgroup as required, but having
 // TableGroupCols not implement Default would leave no possible implementation
 // for TableGroup::with_children.
-#[derive(Debug,PartialEq,Eq,Hash,Serialize,Clone)] pub struct TableGroupCols(pub usize);
-impl Default for TableGroupCols {
-	fn default() -> Self {
-		TableGroupCols(0)
-	}
-}
+#[derive(Default,Debug,PartialEq,Eq,Hash,Serialize,Clone)] pub struct TableGroupCols(pub usize);
 
 // no eq for f64
 #[derive(Debug,PartialEq,Serialize,Clone)]
@@ -104,7 +103,7 @@ impl FromStr for Measure {
 #[cfg(test)]
 mod parse_tests {
 	use super::*;
-	
+
 	#[test]
 	fn measure() {
 		let _a: Measure = "1.5em".parse().unwrap();
@@ -152,4 +151,3 @@ impl CanBeEmpty for bool {
 impl CanBeEmpty for FixedSpace {
 	fn is_empty(&self) -> bool { self == &FixedSpace::default() }
 }
-
diff --git a/document_tree/src/element_categories.rs b/document_tree/src/element_categories.rs
index 24a0798..1f5fcde 100644
--- a/document_tree/src/element_categories.rs
+++ b/document_tree/src/element_categories.rs
@@ -25,9 +25,9 @@ macro_rules! impl_into {
 		$( impl_into!($subcat::$entry => $supcat); )+
 	};
 	($subcat:ident :: $entry:ident => $supcat:ident ) => {
-		impl Into<$supcat> for $entry {
-			fn into(self) -> $supcat {
-				$supcat::$subcat(Box::new(self.into()))
+		impl From<$entry> for $supcat {
+			fn from(inner: $entry) -> Self {
+				$supcat::$subcat(Box::new(inner.into()))
 			}
 		}
 	};
@@ -47,7 +47,7 @@ macro_rules! synonymous_enum {
 		pub enum $name { $(
 			$entry(Box<$entry>),
 		)* }
-		
+
 		impl Debug for $name {
 			fn fmt(&self, fmt: &mut Formatter) -> Result<(), fmt::Error> {
 				match *self {
@@ -55,10 +55,10 @@ macro_rules! synonymous_enum {
 				}
 			}
 		}
-		
-		$( impl Into<$name> for $entry {
-			fn into(self) -> $name {
-				$name::$entry(Box::new(self))
+
+		$( impl From<$entry> for $name {
+			fn from(inner: $entry) -> Self {
+				$name::$entry(Box::new(inner))
 			}
 		} )*
 	};
@@ -106,22 +106,22 @@ synonymous_enum!(SubTableGroup { TableColspec, TableHead, TableBody });
 mod conversion_tests {
 	use std::default::Default;
 	use super::*;
-	
+
 	#[test]
 	fn basic() {
 		let _: BodyElement = Paragraph::default().into();
 	}
-	
+
 	#[test]
 	fn more() {
 		let _: SubStructure = Paragraph::default().into();
 	}
-	
+
 	#[test]
 	fn even_more() {
 		let _: StructuralSubElement = Paragraph::default().into();
 	}
-	
+
 	#[test]
 	fn super_() {
 		let be: BodyElement = Paragraph::default().into();
diff --git a/document_tree/src/elements.rs b/document_tree/src/elements.rs
index 1db0a24..e32c677 100644
--- a/document_tree/src/elements.rs
+++ b/document_tree/src/elements.rs
@@ -59,7 +59,7 @@ macro_rules! impl_element { ($name:ident) => (
 macro_rules! impl_children { ($name:ident, $childtype:ident) => (
 	impl HasChildren<$childtype> for $name {
 		#[allow(clippy::needless_update)]
-		fn with_children(children: Vec<$childtype>) -> $name { $name { children: children, ..Default::default() } }
+		fn with_children(children: Vec<$childtype>) -> $name { $name { children, ..Default::default() } }
 		fn children    (&    self) -> &    Vec<$childtype> { &    self.children }
 		fn children_mut(&mut self) -> &mut Vec<$childtype> { &mut self.children }
 	}
@@ -68,7 +68,7 @@ macro_rules! impl_children { ($name:ident, $childtype:ident) => (
 macro_rules! impl_extra { ($name:ident $($more:tt)*) => (
 	impl ExtraAttributes<extra_attributes::$name> for $name {
 		#[allow(clippy::needless_update)]
-		fn with_extra(extra: extra_attributes::$name) -> $name { $name { common: Default::default(), extra: extra $($more)* } }
+		fn with_extra(extra: extra_attributes::$name) -> $name { $name { common: Default::default(), extra $($more)* } }
 		fn extra    (&    self) -> &    extra_attributes::$name { &    self.extra }
 		fn extra_mut(&mut self) -> &mut extra_attributes::$name { &mut self.extra }
 	}
@@ -82,7 +82,7 @@ impl<T, C, A> HasExtraAndChildren<C, A> for T where T: HasChildren<C> + ExtraAtt
 	#[allow(clippy::needless_update)]
 	fn with_extra_and_children(extra: A, mut children: Vec<C>) -> Self {
 		let mut r = Self::with_extra(extra);
-		r.children_mut().extend(children.drain(..));
+		r.children_mut().append(&mut children);
 		r
 	}
 }
@@ -96,11 +96,11 @@ macro_rules! impl_new {(
 ) => (
 	$(#[$attr])*
 	#[derive(Debug,PartialEq,Serialize,Clone)]
-	pub struct $name { $( 
+	pub struct $name { $(
 		$(#[$fattr])* $field: $typ,
 	)* }
 	impl $name {
-		pub fn new( $( $field: $typ, )* ) -> $name { $name { $( $field: $field, )* } }
+		pub fn new( $( $field: $typ, )* ) -> $name { $name { $( $field, )* } }
 	}
 )}
 
@@ -156,14 +156,14 @@ impl_elems!(
 	(Section, StructuralSubElement)
 	(Topic,   SubTopic)
 	(Sidebar, SubSidebar)
-	
+
 	//structural subelements
 	(Title,      TextOrInlineElement)
 	(Subtitle,   TextOrInlineElement)
 	(Decoration, DecorationElement)
 	(Docinfo,    BibliographicElement)
 	(Transition)
-	
+
 	//bibliographic elements
 	(Author,       TextOrInlineElement)
 	(Authors,      AuthorInfo)
@@ -176,11 +176,11 @@ impl_elems!(
 	(Date,         TextOrInlineElement)
 	(Copyright,    TextOrInlineElement)
 	(Field,        SubField)
-	
+
 	//decoration elements
 	(Header, BodyElement)
 	(Footer, BodyElement)
-	
+
 	//simple body elements
 	(Paragraph,              TextOrInlineElement)
 	(LiteralBlock,           TextOrInlineElement; +)
@@ -193,17 +193,17 @@ impl_elems!(
 	(Target; +)
 	(Raw, String; +)
 	(Image; *)
-	
+
 	//compound body elements
 	(Compound,  BodyElement)
 	(Container, BodyElement)
-	
+
 	(BulletList,     ListItem; +)
 	(EnumeratedList, ListItem; +)
 	(DefinitionList, DefinitionListItem)
 	(FieldList,      Field)
 	(OptionList,     OptionListItem)
-	
+
 	(LineBlock,     SubLineBlock)
 	(BlockQuote,    SubBlockQuote)
 	(Admonition,    SubTopic)
@@ -229,32 +229,32 @@ impl_elems!(
 	(TableRow,   TableEntry;    +)
 	(TableEntry, BodyElement;   +)
 	(TableColspec; +)
-	
+
 	//body sub elements
 	(ListItem, BodyElement)
-	
+
 	(DefinitionListItem, SubDLItem)
 	(Term,               TextOrInlineElement)
 	(Classifier,         TextOrInlineElement)
 	(Definition,         BodyElement)
-	
+
 	(FieldName, TextOrInlineElement)
 	(FieldBody, BodyElement)
-	
+
 	(OptionListItem, SubOptionListItem)
 	(OptionGroup,    Option_)
 	(Description,    BodyElement)
 	(Option_,        SubOption)
 	(OptionString,   String)
 	(OptionArgument, String; +)
-	
+
 	(Line,        TextOrInlineElement)
 	(Attribution, TextOrInlineElement)
 	(Label,       TextOrInlineElement)
-	
+
 	(Caption, TextOrInlineElement)
 	(Legend,  BodyElement)
-	
+
 	//inline elements
 	(Emphasis,              TextOrInlineElement)
 	(Literal,               String)
@@ -272,12 +272,12 @@ impl_elems!(
 	(Problematic,           TextOrInlineElement; +)
 	(Generated,             TextOrInlineElement)
 	(Math,                  String)
-	
+
 	//also have non-inline versions. Inline image is no figure child, inline target has content
 	(TargetInline, String; +)
 	(RawInline,    String; +)
 	(ImageInline; *)
-	
+
 	//text element = String
 );
 
diff --git a/document_tree/src/lib.rs b/document_tree/src/lib.rs
index 9154725..00d6cb2 100644
--- a/document_tree/src/lib.rs
+++ b/document_tree/src/lib.rs
@@ -1,7 +1,9 @@
 #![recursion_limit="256"]
 
-///http://docutils.sourceforge.net/docs/ref/doctree.html
-///serves as AST
+/// See [doctree][] reference.
+/// Serves as AST.
+///
+/// [doctree]: http://docutils.sourceforge.net/docs/ref/doctree.html
 
 #[macro_use]
 mod macro_util;
diff --git a/document_tree/src/url.rs b/document_tree/src/url.rs
index 31a0536..543f9e5 100644
--- a/document_tree/src/url.rs
+++ b/document_tree/src/url.rs
@@ -57,7 +57,7 @@ impl Url {
 
 impl From<url::Url> for Url {
 	fn from(url: url::Url) -> Self {
-		Url(url.into_string())
+		Url(url.into())
 	}
 }
 
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..43bf768
--- /dev/null
+++ b/justfile
@@ -0,0 +1,27 @@
+# just manual: https://github.com/casey/just/#readme
+
+_default:
+    @just --list
+
+watch:
+    cargo watch -s 'just doc' -s 'just fmt'
+
+# Build package
+build:
+    cargo hack --feature-powerset build --verbose
+
+# Runs clippy on the sources
+check:
+    cargo hack --feature-powerset clippy --locked -- -D warnings
+
+# Runs unit tests
+test:
+    cargo hack --feature-powerset --skip=extension-module test --locked
+
+# Build documentation
+doc:
+    RUSTDOCFLAGS="-Dwarnings -Z unstable-options --enable-index-page" cargo +nightly doc --all-features
+
+# Format code
+fmt *args:
+    cargo fmt {{args}}
diff --git a/parser/src/conversion.rs b/parser/src/conversion.rs
index de5f091..5e855ef 100644
--- a/parser/src/conversion.rs
+++ b/parser/src/conversion.rs
@@ -40,7 +40,7 @@ fn get_level<'tl>(toplevel: &'tl mut Vec<c::StructuralSubElement>, section_idxs:
 
 pub fn convert_document(pairs: Pairs<Rule>) -> Result<e::Document, Error> {
 	use self::block::TitleOrSsubel::*;
-	
+
 	let mut toplevel: Vec<c::StructuralSubElement> = vec![];
 	// The kinds of section titles encountered.
 	// `section_idx[x]` has the kind `kinds[x]`, but `kinds` can be longer
@@ -49,7 +49,7 @@ pub fn convert_document(pairs: Pairs<Rule>) -> Result<e::Document, Error> {
 	// `None`s indicate skipped section levels:
 	// toplevel[section_idxs.flatten()[0]].children[section_idxs.flatten()[1]]...
 	let mut section_idxs: Vec<Option<usize>> = vec![];
-	
+
 	for pair in pairs {
 		if let Some(ssubel) = block::convert_ssubel(pair)? { match ssubel {
 			Title(title, kind) => {
@@ -83,7 +83,7 @@ pub fn convert_document(pairs: Pairs<Rule>) -> Result<e::Document, Error> {
 pub fn whitespace_normalize_name(name: &str) -> String {
 	// Python's string.split() defines whitespace differently than Rust does.
 	let split_iter = name.split(
-		|ch: char| ch.is_whitespace() || (ch >= '\x1C' && ch <= '\x1F')
+		|ch: char| ch.is_whitespace() || ('\x1C'..='\x1F').contains(&ch)
 	).filter(|split| !split.is_empty());
 	let mut ret = String::new();
 	for split in split_iter {
diff --git a/parser/src/conversion/block.rs b/parser/src/conversion/block.rs
index 626bc20..a68dd17 100644
--- a/parser/src/conversion/block.rs
+++ b/parser/src/conversion/block.rs
@@ -37,8 +37,9 @@ pub(super) fn convert_ssubel(pair: Pair<Rule>) -> Result<Option<TitleOrSsubel>,
 
 
 fn convert_substructure(pair: Pair<Rule>) -> Result<c::SubStructure, Error> {
+	#[allow(clippy::match_single_binding)]
 	Ok(match pair.as_rule() {
-		// todo: Topic, Sidebar, Transition
+		// TODO: Topic, Sidebar, Transition
 		// no section here, as it’s constructed from titles
 		_ => convert_body_elem(pair)?.into(),
 	})
@@ -50,7 +51,7 @@ fn convert_body_elem(pair: Pair<Rule>) -> Result<c::BodyElement, Error> {
 		Rule::paragraph        => convert_paragraph(pair)?.into(),
 		Rule::target           => convert_target(pair)?.into(),
 		Rule::substitution_def => convert_substitution_def(pair)?.into(),
-		Rule::admonition_gen   => convert_admonition_gen(pair)?.into(),
+		Rule::admonition_gen   => convert_admonition_gen(pair)?,
 		Rule::image            => convert_image::<e::Image>(pair)?.into(),
 		Rule::bullet_list      => convert_bullet_list(pair)?.into(),
 		Rule::literal_block    => convert_literal_block(pair).into(),
@@ -84,7 +85,7 @@ fn convert_title(pair: Pair<Rule>) -> Result<(e::Title, TitleKind), Error> {
 	let mut elem = e::Title::with_children(title_inlines.expect("No text in title"));
 	if let Some(title) = title {
 		//TODO: slugify properly
-		let slug =  title.to_lowercase().replace("\n", "").replace(" ", "-");
+		let slug =  title.to_lowercase().replace('\n', "").replace(' ', "-");
 		elem.names_mut().push(at::NameToken(slug));
 	}
 	let title_kind = match kind {
@@ -163,7 +164,7 @@ fn convert_image<I>(pair: Pair<Rule>) -> Result<I, Error> where I: Element + Ext
 }
 
 fn parse_scale(pair: &Pair<Rule>) -> Result<u8, Error> {
-	let input = if pair.as_str().chars().rev().next() == Some('%') { &pair.as_str()[..pair.as_str().len()-1] } else { pair.as_str() };
+	let input = if pair.as_str().ends_with('%') { &pair.as_str()[..pair.as_str().len()-1] } else { pair.as_str() };
 	use pest::error::{Error,ErrorVariant};
 	Ok(input.parse().map_err(|e: std::num::ParseIntError| {
 		let var: ErrorVariant<Rule> = ErrorVariant::CustomError { message: e.to_string() };
@@ -215,7 +216,7 @@ fn convert_literal_lines(pair: Pair<Rule>) -> e::LiteralBlock {
 		Rule::literal_line_blank => "\n",
 		_ => unreachable!(),
 	}.into()).collect();
-	return e::LiteralBlock::with_children(children);
+	e::LiteralBlock::with_children(children)
 }
 
 fn convert_code_directive(pair: Pair<Rule>) -> e::LiteralBlock {
diff --git a/parser/src/conversion/tests.rs b/parser/src/conversion/tests.rs
index 89b0a1c..e042d01 100644
--- a/parser/src/conversion/tests.rs
+++ b/parser/src/conversion/tests.rs
@@ -41,11 +41,11 @@ fn convert_skipped_section() {
 	let doctree = parse(SECTIONS).unwrap();
 	let lvl0 = doctree.children();
 	assert_eq!(lvl0.len(), 3, "Should be a paragraph and 2 sections: {:?}", lvl0);
-	
+
 	assert_eq!(lvl0[0], e::Paragraph::with_children(vec![
 		"Intro before first section title".to_owned().into()
 	]).into(), "The intro text should fit");
-	
+
 	let lvl1a = ssubel_to_section(&lvl0[1]).children();
 	assert_eq!(lvl1a.len(), 2, "The 1st lvl1 section should have (a title and) a single lvl2 section as child: {:?}", lvl1a);
 	//TODO: test title lvl1a[0]
@@ -55,7 +55,7 @@ fn convert_skipped_section() {
 	let lvl3a = ssubel_to_section(&lvl2[1]).children();
 	assert_eq!(lvl3a.len(), 1, "The 1st lvl3 section should just a title: {:?}", lvl3a);
 	//TODO: test title lvl3a[0]
-	
+
 	let lvl1b = ssubel_to_section(&lvl0[2]).children();
 	assert_eq!(lvl1b.len(), 2, "The 2nd lvl1 section should have (a title and) a single lvl2 section as child: {:?}", lvl1b);
 	//TODO: test title lvl1b[0]
diff --git a/parser/src/lib.rs b/parser/src/lib.rs
index 23e97c7..4f1b8dd 100644
--- a/parser/src/lib.rs
+++ b/parser/src/lib.rs
@@ -22,7 +22,7 @@ pub fn parse_only(source: &str) -> Result<Document, Error> {
 	convert_document(pairs)
 }
 
-/// Parse into a document tree and resolve sections and references. 
+/// Parse into a document tree and resolve sections and references.
 pub fn parse(source: &str) -> Result<Document, Error> {
 	parse_only(source).map(resolve_references)
 }
diff --git a/parser/src/pair_ext_parse.rs b/parser/src/pair_ext_parse.rs
index a04b3dd..fb5ba6b 100644
--- a/parser/src/pair_ext_parse.rs
+++ b/parser/src/pair_ext_parse.rs
@@ -6,16 +6,16 @@ use pest::error::{Error,ErrorVariant};
 
 
 pub trait PairExt<R> where R: pest::RuleType {
-	fn parse<T, E>(&self) -> Result<T, Error<R>> where T: FromStr<Err = E>, E: ToString;
+	fn parse<T, E>(&self) -> Result<T, Box<Error<R>>> where T: FromStr<Err = E>, E: ToString;
 }
 
 impl<'l, R> PairExt<R> for Pair<'l, R> where R: pest::RuleType {
-	fn parse<T, E>(&self) -> Result<T, Error<R>> where T: FromStr<Err = E>, E: ToString {
+	fn parse<T, E>(&self) -> Result<T, Box<Error<R>>> where T: FromStr<Err = E>, E: ToString {
 		self.as_str().parse().map_err(|e| to_parse_error(self.as_span(), &e))
 	}
 }
 
-pub(crate) fn to_parse_error<E, R>(span: Span, e: &E) -> Error<R> where E: ToString, R: pest::RuleType {
+pub(crate) fn to_parse_error<E, R>(span: Span, e: &E) -> Box<Error<R>> where E: ToString, R: pest::RuleType {
 	let var: ErrorVariant<R> = ErrorVariant::CustomError { message: e.to_string() };
-	Error::new_from_span(var, span)
+	Box::new(Error::new_from_span(var, span))
 }
diff --git a/parser/src/simplify.rs b/parser/src/simplify.rs
index 4c254af..ab04964 100644
--- a/parser/src/simplify.rs
+++ b/parser/src/simplify.rs
@@ -33,6 +33,7 @@ use document_tree::{
 
 
 #[derive(Debug)]
+#[allow(dead_code)]
 enum NamedTargetType {
 	NumberedFootnote(usize),
 	LabeledFootnote(usize),
@@ -43,11 +44,9 @@ enum NamedTargetType {
 	SectionTitle,
 }
 impl NamedTargetType {
+	#[allow(dead_code)]
 	fn is_implicit_target(&self) -> bool {
-		match self {
-			NamedTargetType::SectionTitle => true,
-			_ => false,
-		}
+		matches!(self, NamedTargetType::SectionTitle)
 	}
 }
 
@@ -55,7 +54,7 @@ impl NamedTargetType {
 struct Substitution {
 	content: Vec<c::TextOrInlineElement>,
 	/// If true and the sibling before the reference is a text node,
-	/// the text node gets right-trimmed. 
+	/// the text node gets right-trimmed.
 	ltrim: bool,
 	/// Same as `ltrim` with the sibling after the reference.
 	rtrim: bool,
@@ -79,7 +78,7 @@ impl TargetsCollected {
 			_ => unimplemented!(),
 		}
 	}
-	
+
 	fn substitution<'t>(self: &'t TargetsCollected, refname: &[NameToken]) -> Option<&'t Substitution> {
 		// TODO: Check if the substitution would expand circularly
 		if refname.len() != 1 {
@@ -378,7 +377,7 @@ impl ResolvableRefs for c::TextOrInlineElement {
 					// The corresponding SystemMessage node should go in a generated
 					// section with class "system-messages" at the end of the document.
 					use document_tree::Problematic;
-					let mut replacement: Box<Problematic> = Box::new(Default::default());
+					let mut replacement: Box<Problematic> = Box::default();
 					replacement.children_mut().push(
 						c::TextOrInlineElement::String(Box::new(format!("|{}|", e.extra().refname[0].0)))
 					);
diff --git a/renderer/src/html/tests.rs b/renderer/src/html/tests.rs
index a4ec633..c29e9d8 100644
--- a/renderer/src/html/tests.rs
+++ b/renderer/src/html/tests.rs
@@ -307,7 +307,7 @@ fn code() {
 
    def foo():
        print('Hi!')
-   
+
        # comment
 ", "\
 <pre><code class=\"language-python\">def foo():
diff --git a/rst/src/main.rs b/rst/src/main.rs
index 318bcb6..cf16b16 100644
--- a/rst/src/main.rs
+++ b/rst/src/main.rs
@@ -34,7 +34,7 @@ struct Cli {
 fn main() -> CliResult {
 	let args = Cli::from_args();
 	args.verbosity.setup_env_logger("rst")?;
-	
+
 	// TODO: somehow make it work without replacing tabs
 	let content = read_file(args.file)?.replace('\t', " ".repeat(8).as_ref());
 	let document = parse(&content)?;
diff --git a/rust-rst.svg b/rust-rst.svg
index 894715d..a67350a 100644
--- a/rust-rst.svg
+++ b/rust-rst.svg
@@ -22,7 +22,7 @@
 	}
 
 	/* can be used to regenerate/change the logo */
-	.rust-rst-logo text { 
+	.rust-rst-logo text {
 		display: none;
 		font-size: 90.66667175px;
 		line-height: 1.25;